气候变化领域集成服务门户(CCPortal): Driving mechanisms for the El Nino-Southern Oscillation impact on stratospheric ozone

CCPortal

DOI	10.5194/acp-22-15729-2022
	Driving mechanisms for the El Nino-Southern Oscillation impact on stratospheric ozone
	Benito-Barca, Samuel; Calvo, Natalia; Abalos, Marta
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	15729
结束页码	15745
卷号	22 期号:24 页码:17
英文摘要	While the impact of the El Nino-Southern Oscillation(ENSO) on the stratospheric circulation has been long recognized, itseffects on stratospheric ozone have been less investigated. In particular,the impact on ozone of different ENSO flavors, eastern Pacific (EP) ElNino and central Pacific (CP) El Nino, and the drivingmechanisms for the ozone variations have not been investigated to date. Thisstudy aims to explore these open questions by examining the anomalies inadvective transport, mixing and chemistry associated with different ElNino flavors (EP and CP) and La Nina in the Northern Hemisphere inboreal winter. For this purpose, we use four 60-year ensemble members of theWhole Atmospheric Community Climate Model version 4. The results show asignificant ENSO signal on the total column ozone (TCO) during EP El Ninoand La Nina events. During EP El Nino events, TCO is significantlyreduced in the tropics and enhanced at middle and high latitudes in borealwinter. The opposite response has been found during La Nina.Interestingly, CP El Nino has no significant impact on extratropical TCO,while its signal in the tropics is weaker than for EP El Nino events.The analysis of mechanisms reveals that advection through changes intropical upwelling is the main driver for ozone variations in the lowertropical stratosphere, with a contribution of chemical processes above 30 hPa. At middle and high latitudes, stratospheric ozone variations related toENSO result from combined changes in advection by residual circulationdownwelling and changes in horizontal mixing linked to Rossby wave breakingand polar vortex anomalies. The impact of CP El Nino on the shallowbranch of the residual circulation is small, and no significant impact isfound on the deep branch.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000898382700001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273843
作者单位	Complutense University of Madrid
推荐引用方式 GB/T 7714	Benito-Barca, Samuel,Calvo, Natalia,Abalos, Marta. Driving mechanisms for the El Nino-Southern Oscillation impact on stratospheric ozone[J],2022,22(24):17.
APA	Benito-Barca, Samuel,Calvo, Natalia,&Abalos, Marta.(2022).Driving mechanisms for the El Nino-Southern Oscillation impact on stratospheric ozone.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(24),17.
MLA	Benito-Barca, Samuel,et al."Driving mechanisms for the El Nino-Southern Oscillation impact on stratospheric ozone".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.24(2022):17.